printf function call causes hard fault

[Pramod K.G.]

Hi all,

I am working on a STM32F103VEtx MCU. In my firmware I have redirected the printf function to a UART for debugging purposes. When I start running the code, the printf function causes the hard fault handler to hit. Please see the call stack attached below

Thread #1 (Suspended : Signal : SIGINT:Interrupt)   

   prvGetRegistersFromStack() at stm32f1xx_it.c:109 0x800441a   

   <signal handler called>() at 0xfffffff9   

   std() at 0x8007abe   

   __sinit() at 0x8007b76   

   printf() at 0x8006dac   

   main() at main.c:130 0x800400c

It seems like  std() function call triggers the hard fault. Please help me to figure out and fix the issue.

Thanks in advance,

Pramod K. G.

[berendi]

The runtime library sources should be available where your toolchain (compiler etc) came from.